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When astronaut Tim Kopra was injured in a bicycle accident, astronaut Steve Bowen was assigned to STS-133. With only six weeks until launch, Bowen has been training at the Johnson Space Center for the mission and the two spacewalks he will perform. In this episode of NASA Behind the Scenes, Bowen talks about hearing the news and becoming the first American astronaut to fly back-to-back missions and undergo the shortest training time since Apollo 13.